计算练习一1
直接写出得数378+ 199= 12×5= 23 +34 = 910 ÷13 =512 ×47 +107×512 =4+54 = 9
3= 5-117-37 = 1÷35 ×5= 1
25×3× 8=2.计算χ -49 χ =1027 300-288÷12× 5 815 ×[(34 -12 ) ÷35 ] 计算练习二1
直接写出得数488- 199= 4
8÷12= 4
55 =58 -14 =34 ÷12 = 1-59 +49 =310 ×56 =712 ×34 +54 ×712 =2.计算34 ︰χ =38 ︰23712 ÷9+19 ×512910 ÷[12 ×(65 -710 )] 计算练习三1
直接写出得数24×5= 0
36÷12= 1÷25 ×5= (23 +14 ) × 12=23 +12 =578- 299 =23 ÷118 = 1
25×11×8=45 × 10=34 -58 =2.计算x ∶42=57 ∶10 430―3684÷12+93 310 ×[(34 -23 ) ÷14 ] 计算练习四1
直接写出得数3
6 ÷ 12= 860-298= 8-37 -47 = 2
2 = 1÷0
5 ×2=2
65 = (13 +25 ) ×15=35 ×15=14 ÷12 = 2
5×17×0
4 =2.计算χ +35 χ = 16 6
2 215 ÷[25 -( 1-710 )] 计算练习五1
直接写出得数1
5 =23 ×12= 1-511 +611 = 25×4= 2÷1%= 0
23= 4―14 = 910 ÷13 = 560÷5÷8= 348+199= 2.计算0
3χ=67 4260÷ 15-12×4
25 [1112 -(25 +